Valve



w. GRANTLAND. GOPIIFOUND VALVE, AFPIilCATION FILED APR. 27' $916.

i wfifil a Patentd June a, 1919.

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m: NORRIS PETERS co F'HOYO-LIYHD w/nsmuumu. n cy State of Ohio,

J HN W. GRANTLAND, OF CINCINNATI, OHIO.

COMPOUND VALVE.

Specification of Letters Patent. Patented June 3, 1919.

Application filed April 27, 1916. Serial N 0. 94,033.

To all whom it may concern:

Be itknown that 1, JOHN W. GRANTLAND, a citizen of the United States, and residing at Cincinnati, in the county of Hamilton and have invented a new and useful Improvement inCompound Valves, of which the following'specification'is a full disclosure. a

My invention relates to-a compound valve particularly adapted for "injectors of the double tube class, wherein a lifting ejector is employed to supply water to a forcing in ector, which in turn operates to force and feed the water supplied to it against counter-pressure, such as that of a steam boiler.

The valves as members of a compound or unit structure are all seating valves under a single control and incidentally hereto in sequence of operation. Asseatingvalves they are supported to move relatively free and in axial alinement with the respective seats for efi'ective. seating.

An object of the invention is to provide a compound valve wherein two members close relatively fixedports and each guidingly supported within its port and adapted to move for independently and unitarily controlling and readily separable from their unit. structure for grinding and repair purposes.

. Structurally as-a compound valve it may be adaptedfor uses other than herein especially designated, as in connection with boiler feed injectors, andfor the present purposes the drawing illustrates a preferred embodiment of valve and injector, andthe description thereof is confined thereto, and from which various other objects andadvantages can be readily comprehended, and in which drawings like characters; of reference will be used to designate similar parts throughout the; different views, of which Figure l is a longitudinal section of an injector of double tube type. .Fig. 2 is an elevation on an enlarged scale of the compound valve embodying my invention. Fig. 3 is a centralsection through the compound valve including in section a portion of the injector illustrating the valves engaged with their respective seats for port control. Fig. 4 is a section on line H, Fig. 2.

preexisting.

eating with the force tubes,

livering tube 12, which delivers .alined with the port 7. The

The injector as shown represents a double tube type having structurally attained a standard of construction well-known so as not torequire detailed description for most of the parts, except as relates to the improvements and inventions which difierentiate the structure here shown from those Referring to the drawings, 1 indicates the main casing or body of a double tube type of injector having a steam inlet passage 2 leading to the valve-seat-equipped steam inlet port 3 comprised in a slot sleeve or fer rule screw-threaded into an opening in the division web of the casing. The seat sleeve receives the compound valve for controlling the'steam admitted to the various tubes. A steam passage 5 is disposed at'the opposite side of the steam inlet port communithrough a port 7 and controlled by a valve member of the compound valve, to be more fully herein after described. 7 The steam passage 5 extends and leads to the steamadmission tube 8 of the lifter tube. At the inlet end of the tube 8 a valve 9 operated by a hand wheel 10 i'sprovided for controlling the admission of steam to said tube. The lifter steam from the steam tube 8 entrains water from the water supply passage 11 into the lifter combining and dethe water to the lifter delivery chamber 13. The contiguously associated ends of the toner steam tube 14' and'thaforcer combining tube 15 are located infthe delivery chamber 13, said tubes 14: and 15 being axially forcer combining and delivery tube 15 emerges into the forcer delivery chamber 16. A port controlled by an automatically operated valve 17 connects the chamber 13 with the chamber 16 and the chamber 16 connects with the overflow passage 18 through a port controlled by the manually operated valve 19.

The injector parts, as above described, compare with those described in the Park & Williston Patent No. 492,944, dated March 7 1893, to which reference may be had for a more complete detailed description thereof. The compoundva-lve comprises a main tending lugs 35.

axially through the mainvalvemember 21.

The main valve member 20 and its secondary valve member 22 may be referred to as a differential in the control of the steam admitted from the steam passage 2 to the steam passage or chamber 5 which branches to the different tubes.

The main valve member 20 may be designated as a conical valve engaging with the tapering seat surface of the sleeve or ferrule 4. The valve 20 has a cylindrical extension 24: serving as a bonnet to internally receive the gland 25, which concentrically and guidingly receives the stem 26 detachably connecting with the secondary valve 22. The cylindrical extension 24 of the valve 20 has a series of apertures or ports 27 therethrough connecting the steam inlet passage 2 with the valve chamber 28 for, admitting steam into passage 5 when the secondary valve 22 is opened, the purpose of which will be explained hereinafter.

From the opposite side .of the valve 20 a series of guide arms 29 projects longitudinally with the valve axis, with the arms joined by an. apertured web 30. The arms 29 guidingly support the valve 20 within the seat ferrulel for maintaining the valve in its proper registry alinement with its seat, and when the valve is seated, the steam pressure against the rear end of the valve will hold it against its seat.

The valve member 21 may be designated as a disk valve to engage with a fiat seat 7 surface at the endof the port7. A series of ide arms 31 project from one side of said disk valve 21 guidingly supported within the port 7 and the opposite side of the valve is provided with a tubular extension 32 coaxially therewith. The tubular extension or hub 32 engages valve 20 through the aper ture of the web 30. The extension 32 floatingly joins the valves 20 and 21 and assists in maintainin the axial alinement in relation to each ot er and with their respective seats, while each is free to seat independently ofthe other.

A gland 33 is screw-threaded into the end of the tubular extension 32, having its flange head 34 provided with diametrically ex- Each of the lugs 35 is adapted to engage between two adjacent arms 29 which alternately serve as abutments for locking the gland against rotation when connecting or disconnecting the gland from the valve extension 32. The lugs also serve to couple the valves 20 and 21 to gether as a unit. The secondary or axial valve is provided with guide wings 36 and stem 37 projecting from one side thereof for supporting the valve within the main valve 20 and for coupling the same to the valve 21. The stem 37 engages through the gland 33 and has a collar or flange 38 at its end, adapted to abuttingly engage the end of the gland 33 for retainingly uniting said valve and permitting each to move axially independentlyof the other for seating and for timing the relative openings. The opposite side of the valve 22 is provided with an open notch 39 for detachably receiving the flanged end of the actuator stem26, providing a single control for all the valves as members of the compound. The stem 26 projects and reciprocates through the bonnet l0 screw-threaded within the casing 1 and connects with an operating hand lever 41 suitablyful'crumed exterior ofthe casing.

All valves as seating valvescan sustain considerable wear without losing their capacity for positive steam-tight. seating and can easily be reground to a seat whenever necessary, and each can be separatelyrenewed or' replaced.

In valves that are substantially su ported within their ports and relative y upon each other, no opportunity is given for any chatter, and the thrust and pull of the actuator stem is equally distributed, prolonging the life of the valves and their seat as well as insuring perfect seating, as all have freedom to slide axially independently of each other. 7

The operationof a compound valve is the same as that of the compound valve heretofore employed in boiler feeding injectors of the Hancock type. Moving the stem 26 unseats the valve 22, initially permitting the steam to pass through the radial ports 27 in the main valve 20, valve chamber 28 and port 23, to the" appropriate steam tubes. continued motion of the valve brings it abuttingly into engagement withthe gland 25 of the valve 20 moving valve 20 therewith to admit a greater volume of steam into the chamber 5 following finally with the collar 38 of the stem 37' movingly engaging with the valve 21 for unseating and openingsa'id valve. Valves 20 and 21 preferably move approximately simultaneously, and the relative timing can be readily altered by adjusting the collar 38 upon the stem so that the valves operate under the most favorable conditions.v

Having thus described my invention, I claim In a compound valve for seating over two relatively fixed ports in axial alinement and spaced, the combination of two primary 7 valves, as a first and second, cofiperating with seats at said ports respectively, each valve slidingly" supported and sustained within its port, a secondary valve mounted and having limited motion within .the first primary valve and having a stem telescopically engaging with a stem of the second primary valve, a member for coupling said valve stems, interlockingly engaging with said first primary valve, said member being' fixed to one valve stem and loosely connecting With the other valve stem, and

controlling means detachably connecting with said secondary valve for moving the same, and consecutively the other valves of the series, through their engagement one unit.

In witness whereof, I hereunto subscribe L. A. BUCK, EMMA SPENER.

with the other and subsequently as a 10 Copies of this patent may be obtained for live cents each, by addressing the "Commissioner 01 Patents,

Washington, D. (1.." 

